refactor: align module naming with ai-agent

internal/services/subject_service.go

@@ -37,7 +37,7 @@ func (s *subjectService) Authorize(ctx context.Context, operation string) error
 	fn := s.authorize
 	s.mu.RUnlock()
 	if fn == nil {
-		return errors.New("agent-desk: Authorize is not initialized")
+		return errors.New("ai-agent: Authorize is not initialized")
 	}
 	return fn(ctx, operation)
 }
@@ -47,7 +47,7 @@ func (s *subjectService) Query(ctx context.Context, query identity.Query) ([]ide
 	fn := s.query
 	s.mu.RUnlock()
 	if fn == nil {
-		return nil, errors.New("agent-desk: QuerySubjects is not initialized")
+		return nil, errors.New("ai-agent: QuerySubjects is not initialized")
 	}
 	return fn(ctx, query)
 }
@@ -58,7 +58,7 @@ func (s *subjectService) Current(ctx context.Context) (*identity.Subject, error)
 		return nil, err
 	}
 	if len(items) == 0 {
-		return nil, errors.New("agent-desk: current subject not found")
+		return nil, errors.New("ai-agent: current subject not found")
 	}
 	return &items[0], nil
 }
@@ -69,7 +69,7 @@ func (s *subjectService) CurrentExternal(ctx context.Context) (*openidentity.Ext
 		return nil, err
 	}
 	if subject.Category != identity.CategoryUser || !subject.Enabled {
-		return nil, errors.New("agent-desk: current subject is not a customer identity")
+		return nil, errors.New("ai-agent: current subject is not a customer identity")
 	}
 	return &openidentity.ExternalUser{
 		ExternalSource: enums.ExternalSourceUser,